I always loved the idea of a automatic drain plug. What I wasn't thrilled with was the installation instructions that called for you to drill a 1 3/4 inch hole through the splash-well or cockpit area of the boat. Also; equipment does break and companies change specifications or go out of business and then your stuck with a 1 3/4 hole in your boat. I decided that I needed the control actuator in the battery compartment where I could reach it inside or outside the boat. Materials I used; Flow Rite Auto Drain Plug Kit ($74 -$89), Conduit Strut hanger 2" or 2 1/2 inch galvanized (94 cents!!) Right Angle drill attachment ($15-$25), 5/16 drill bit, 1 inch long 5/16 bolt, nut, steel washer and rubber washer, masking tape, "Rubberized" electrical tape.
I install the plug, actuator wire and cable per manufactures instructions. I mount the actuator in-out switch flush to the outside edge of the strut hanger. Put masking tape on inside lip of battery hatch fiberglass door frame where you plan on drilling the 5/16 hole for hanger bolt. Drill hole with angle attachment. Remove masking tape and replace with rubberized tape the same size as the hanger base. This protects the finish (no one sees it with door down) and gives the hanger something to bite into. Put bolt in hanger, bolt through hole, install rubber washer then steel washer and tighten down with nut. It's a very solid installation which can be removed in twenty seconds by removing one bolt. It's tamper proof because it's concealed. It's practical because I stand on the right side of my boat when I launch to access the power and tilt trim on my motor. I can also easily access it from inside the boat.